<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">

var tools = function(){};
tools.prototype = {
		a:'yahoo',
		b:'google'
}
tools.prototype.sayA = function(){
	alert('a');
}
tools.sayA = function(){
	alert('A');
}
var t = new tools();
t.sayA();
tools.sayA();
alert(t.a);
</script>
</head>
<body>

</body>
</html>